It's not guaranteed or foolproof, but it takes a long time and a lot of interaction to generate large numbers of both.

They are not intended as fool-proof guarantees. 

Happened too many times for first 3-4 years.There is no risk of loosing the "deposit" either and it's just a bit of skin in the game even tho the skin is always yours to keep heheCovered all angles mate and made this as fool proof as possible but still enough to make folks "jump" through hoops to see who is legit and who isn't.As Chris mentioned, 90% of investors we don't end up working with and even when many commit to the deposit, I refund many times as I don't feel a good fit.Even with such stringent criteria, we still get mud thrown on us here on BP as some folks slip through the cracks.I could only imagine if we took on everyone and just focused on pushing sales.I can sell a TV to a blind man and ice to an eskimo.

This works almost everywhere and is almost fool proof.

Not foolproof, but a very good way to start. 

Unfortunately, no fool proof secrets just preventative measures.

I am not advising you that this is a 100% foolproof method either.  

No investing method is foolproof.

Originally posted by @Kai Van Leuven:@Joe Villeneuve and @Michael P.Sorry forgot, Real Estate is a foolproof industry that can not fail.

It's not foolproof but it certainly helps preventing us from getting ripped off.